2019

6.9

1975

5.5

1976

5.7

1988

7.1

2001

5.1

1989

3.1

1968

7.6

1989

5.0

2003

7.8

2006

7.4

2004

5.5

1993

7.8

2002

5.6

2012

4.4

1970

2.0

2007

3.8

1988

3.7

1969

6.5

2013

6.7

2009

6.5